铁基合金中马氏体均匀形核热力学探讨  

The Thermodynamics of Homogeneous Martensitic Nucleation in Iron Based Alloys

作　　者：赵新清[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《材料工程》1999年第11期3-5,共3页Journal of Materials Engineering

摘　　要：根据马氏体相变的经典形核理论， 重新对铁基合金中马氏体相变的形核过程进行了热力学估算。结果表明，均匀形核的临界形核功比热能低一个数量级。这意味着铁基合金中的马氏体相变形核可由热起伏来促发。对早期的小颗粒实验以及铁基体材料中马氏体相变的相关实验结果进行了分析讨论。On the basis of classical nucleation theory,the thermodynamics of martensitic nucleation in iron based alloys was reconsidered It is indicated that the critical nucleation work is one order of magnitude lower than the thermal energy,suggesting that martensite in iron based alloys can be nucleated by thermal fluctuation The early small particle experiments and relevant experimental data were analyzed,revealing that the homogeneous martensitic nucleation mechanism is compatible with the experimental results

关 键 词：马氏体相变 形核 铁基合金 热力学 

分 类 号：TG113.12[金属学及工艺—物理冶金]